Jambs m



(No Model.)

J. M. DODGE.

YDLE STOCK.

Patented Juy 1, 1884.

UNITED STATES ATEN DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 301,101, dated July l,1884. Application filed November 2:2, 1883. (No model.)

To @ZZ whom t may concern:

Be it known that I, JAMEs M. DODGE,` a resident of Indianapolis, Marioncounty, Indiana, have made certain new and useful Improvements inDie-Stocks, a description of which is set forth in the followingspecification, reference being made to the accompanying drawings, in theseveral figures of which like letters indicate like parts.

My invention belongs to that class of de l vices which are used forcutting threads upon iron pipe, and is designed to furnish inone machineall parts sufficient for cutting threads on pipes of different sizes,and providing for changes without requiring separate pieces to becarried about by the workman.

In the drawings, Figure l represents a side view of my device; Fig. 2, aplan view of the interior ofthe stock and dies only. Fig. 3 is a sideview of the guide. Fig. 4 is a vertical section ofthe device with a pipein the dies.

In detail, s is the stock, in which are dies d, having a number ofprojecting or cutting edges of different lengths. These dies havejournals formed on the lower ends, which are supported in bearings4 b orthe round openings formed in the bottom plate, bp, of the stock, andbearings Z1 or round openings formed in the inner plate, p, which issupported on lugs Vformed in the four corners or sides of the stock s.Above the bearings b the die stem or axis extends upward,and hasknobs orpro Ijections a formed on its top, these knobs being regular prismshaving sides correspond ing in number to the cutting-edges ofthe dies,and adapted to t into openings of corresponding shape and size in thelockplate lp,

which fits down into the top of the stock, and is heldin place bythumb-screws ts at each end. The pipe p passes freely through openingsin the lockplate lp and inner plate, j), to the dies d. On top of thelock-plate lp is a cupshaped socket, into which is fitted loosely theguide t(/,wh'ich is hollow, having as many sides as there arecutting-edges to the dies, and openings of corresponding size on each oftWo opposite sides, and these openings are graduated to t differentsizes of pipe. Thus in the one shown in the drawings there are sevensets of opposite sides, and seven sizes of openings This guide adaptedfor different sizes of pipe.

may be made in a variety of shapes, the socket being made to correspondwith it. Thus a cube may be used, and this could be used for three sizesof openings to admit three sizes of pipes. The strap st is passed overthe guide and screwed fast simply to hold the guide g in place. Byraising the strap the guide g may be readily turned around,so thateither opening may be placed in line with the opening in the lock-plate,through Which the pipe passes.

The dies d may be readily adjusted by removing the lock plate andvturning them around,by hand or other means,in their bearings, so thatany one of the cutting-edges may be brought to the front and against theline of the pipes direction. Of course, Whatever number of dies beused-two, three, or fourthey must all present the corresponding cuttersat the same time. For convenience, these may be stamped with gurescorrespondingto each other on the top of each of the projections. Afterthe vdies are properly arranged the lock-plate is replaced, screwedfast, the guide f/ set in its socket, the strap fastened over it, thepipe end inserted in the proper opening in the guide, and fed onward tothe dies, and the stock revolved by its handles. My device thus alwayshas in itself the parts needful forthreading pipes of several diiferentsizes, and is cheap and eiiicient.

Vhat I claim, and desire to secure by Leti ters Patent, is thefollowing:

l. The stock s, the dies d, inner plate, p, lock-plate Zp, base-platebp, and knobs a, all

combined substantially as and for the purpose l described.

2. The stock s, dies d, having knobs a, inner plate, p, base-plate bp,lock-plate 7p, and movable guide g, all combined substantially as andfor the purpose described.

3. The multiple-faced movable guide g, in combination with a die stockand means for securing the guide in place in the stock, substantially asdescribed.

In witness whereof I have hereunto set my hand this 14th day ofNovember, 1883.

JAMES M. DODGE.

W'itnesses:

G. l?. J A cons, N. lV. OTT.

